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1 ` <br /> Mr R R Zielinski March 4, 1992 <br />. 02320 1940 Page 2 <br /> The water samples were analyzed using modified EPA methods 503018020/8015, which measure <br /> concentrations of total petroleum hydrocarbons-as-gasoline (TPH-G), and benzene, toluene, <br /> ethylbenzene and xylenes (BTEX) <br /> MW-1 was not sampled due to the presence of SP, MW-10 was not sampled because it was <br /> obstructed <br /> GROUNDWATER ANALYTICAL RESULTS <br /> Concentrations of TPH-G in the February 5, 1992 groundwater samples ranged from 1,600 parts per <br /> billion (ppb) to 160,000 ppb, benzene concentrations ranged from 4 5 ppb to 17,000 ppb (Figures 2 <br /> and 3) Analytical results for the February 5, 1992 samples, along with results from the four previous <br /> sampling events are presented in Table 3 Copies of the laboratory analyses reports are presented in <br /> Attachment I <br /> Please contact Groundwater Technology's West Sacramento office if you have questions or comments <br /> regarding this quarterly report <br /> Sincerely, <br /> GROUNDWATER TECHNOLOGY, INC <br /> DANISE M SCRIVEN <br /> Project Geologist <br /> djvt,� �-- G�� <br /> JOHN E BOWER, R E A <br /> Environmental Geologist <br /> Project Manager <br /> E K SIMONIS, R G �' �0 <br /> Senior Environmental Geologist C: '+l cn <br /> No 4422 s <br /> DMS/JEB/EKS rc <br /> Attachments <br /> t,r� OF C,`'V( "' <br /> cc D E Heinrich, Texaco Environmental ervices <br /> 1940OTR R1 <br /> GROUNDWATER <br /> r__ ;TECHNOLOGY <br />